package com.xiansiblog.controller.admin;

import com.xiansiblog.entity.User;
import com.xiansiblog.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;

/**
*@Description: 用户登录控制器
*@Author: 弦思
*@Date 2021/2/2
*/
@Controller
@RequestMapping("/admin")
public class LoginController {
    @Autowired
    private UserService userService;
    /**
    *@Description: 跳转登录页面
    *@Author: 弦思
    *@Date 2021/2/2
    *@Return: 返回登录页面
    */
    @GetMapping
    public String loginPage(){
        return "admin/login";
    }

    /**
    *@Description: 登录校验
    *@Author: 弦思
    *@Date 2021/2/2
    *@Param: username:用户名
    *@Param: password:密码
    *@Param: session:session域
    *@Param: attributes:返回页面消息
    *@Return: attributes:登录成功跳转登录成功页面，登录失败返回登录页面
    */
    @PostMapping("login")
    public String login(@RequestParam String username,
                        @RequestParam String password,
                        HttpSession session,
                        RedirectAttributes attributes){
        User user = userService.checkUser(username, password);
        if (user != null) {
            user.setPassword(null);
            session.setAttribute("user",user);
            return "admin/index";
        } else {
            attributes.addFlashAttribute("message","用户名和密码错误");
            return "redirect:/admin";
        }
    }

    /**
    *@Description: 注销
    *@Author: 弦思
    *@Date 2021/2/2
    *@Param: session:session域
    *@Return: 返回登录页面
    */
    @GetMapping("/logout")
    public String logout(HttpSession session){
        session.removeAttribute("user");
        return "redirect:/admin";
    }
}
